I'm experincing a strange problem when I try to export my app as an Air application. I had to get a new codesigning certificate from Verisign because my old one expired. When I changed certificate the problems started. When I export the Application everything seems to work but when on a fresh computer the file the publisher shows up as unknown. When I try to install the app on a computer that has the app already installed (upgrade) I get an error message telling me that the file is corrupt. The log from the install look like this:

The problem was that the root certificate was not set to allow timestamping. I got no sign that this was the case when I tried to sign my apk. As soon as I changed the settings for the root certificate the signing worked as expected.

The install issue still exists so someone might have anything to add there?